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https://github.com/netfun2000/lcd4linux.git
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794ed8524c
some reorganization moved drv_generic to drv_generic_serial moved port locking stuff to drv_generic_serial git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@324 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
616 lines
14 KiB
C
616 lines
14 KiB
C
/* $Id: drv_generic_text.c,v 1.3 2004/01/20 14:25:12 reinelt Exp $
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*
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* generic driver helper for text-based displays
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*
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* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: drv_generic_text.c,v $
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* Revision 1.3 2004/01/20 14:25:12 reinelt
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* some reorganization
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* moved drv_generic to drv_generic_serial
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* moved port locking stuff to drv_generic_serial
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*
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* Revision 1.2 2004/01/20 12:45:47 reinelt
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* "Default screen" working with MatrixOrbital
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*
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* Revision 1.1 2004/01/20 05:36:59 reinelt
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* moved text-display-specific stuff to drv_generic_text
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* moved all the bar stuff from drv_generic_bar to generic_text
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*
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*/
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/*
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*
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* exported fuctions:
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*
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* Fixme: document me!
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <termios.h>
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#include <fcntl.h>
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#include "debug.h"
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#include "cfg.h"
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#include "plugin.h"
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#include "widget.h"
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#include "widget_text.h"
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#include "widget_bar.h"
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#include "drv.h"
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#include "drv_generic_text.h"
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typedef struct {
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int val1;
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int val2;
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DIRECTION dir;
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int segment;
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} BAR;
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typedef struct {
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int val1;
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int val2;
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DIRECTION dir;
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int used;
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int ascii;
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} SEGMENT;
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static char *Driver;
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int DROWS, DCOLS; // display size
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int LROWS, LCOLS; // layout size
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int XRES, YRES; // pixels of one char cell
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int CHARS; // number of user-defineable characters
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char *LayoutFB = NULL;
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char *DisplayFB = NULL;
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static BAR *Bar = NULL;
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static int nSegment=0;
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static int fSegment=0;
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static SEGMENT Segment[128];
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// ****************************************
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// *** generic Framebuffer stuff ***
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// ****************************************
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void drv_generic_text_resizeFB (int rows, int cols)
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{
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char *newFB;
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int row, col;
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// Fixme: resize Bar FB too!!!!
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// Layout FB is large enough
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if (rows<=LROWS && cols<=LCOLS)
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return;
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// allocate new Layout FB
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newFB=malloc(cols*rows*sizeof(char));
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memset (newFB, ' ', rows*cols*sizeof(char));
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// transfer contents
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if (LayoutFB!=NULL) {
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for (row=0; row<LROWS; row++) {
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for (col=0; col<LCOLS; col++) {
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newFB[row*cols+col]=LayoutFB[row*LCOLS+col];
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}
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}
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free (LayoutFB);
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}
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LayoutFB = newFB;
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LCOLS = cols;
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LROWS = rows;
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}
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int drv_generic_text_draw_text (WIDGET *W, int goto_len,
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void (*drv_goto)(int row, int col),
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void (*drv_write)(char *buffer, int len))
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{
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WIDGET_TEXT *T=W->data;
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char *txt, *fb1, *fb2;
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int row, col, len, end;
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row=W->row;
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col=W->col;
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txt=T->buffer;
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len=strlen(txt);
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end=col+len;
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// maybe grow layout framebuffer
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drv_generic_text_resizeFB (row, col+len-1);
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fb1 = LayoutFB + row*LCOLS;
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fb2 = DisplayFB + row*DCOLS;
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// transfer new text into layout buffer
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memcpy (fb1+col, txt, len);
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for (; col<=end; col++) {
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int pos1, pos2, equal;
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if (fb1[col]==fb2[col]) continue;
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drv_goto (row, col);
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for (pos1=col, pos2=pos1, col++, equal=0; col<=end; col++) {
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if (fb1[col]==fb2[col]) {
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// If we find just one equal byte, we don't break, because this
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// would require a goto, which takes several bytes, too.
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if (++equal>goto_len) break;
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} else {
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pos2=col;
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equal=0;
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}
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}
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memcpy (fb2+pos1, fb1+pos1, pos2-pos1+1);
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drv_write (fb2+pos1, pos2-pos1+1);
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}
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return 0;
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}
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// ****************************************
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// *** generic bar handling ***
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// ****************************************
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static void drv_generic_text_bar_clear(void)
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{
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int i;
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for (i=0; i<LROWS*LCOLS; i++) {
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Bar[i].val1 = -1;
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Bar[i].val2 = -1;
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Bar[i].dir = 0;
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Bar[i].segment = -1;
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}
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for (i=0; i<nSegment;i++) {
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Segment[i].used = 0;
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}
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}
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static void drv_generic_text_bar_create_bar (int row, int col, DIRECTION dir, int len, int val1, int val2)
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{
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int rev=0;
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switch (dir) {
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case DIR_WEST:
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val1 = len-val1;
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val2 = len-val2;
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rev = 1;
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case DIR_EAST:
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while (len > 0 && col < LCOLS) {
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Bar[row*LCOLS+col].dir=dir;
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Bar[row*LCOLS+col].segment=-1;
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if (val1 >= XRES) {
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Bar[row*LCOLS+col].val1 = rev?0:XRES;
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val1 -= XRES;
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} else {
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Bar[row*LCOLS+col].val1 = rev?XRES-val1:val1;
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val1 = 0;
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}
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if (val2 >= XRES) {
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Bar[row*LCOLS+col].val2 = rev?0:XRES;
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val2 -= XRES;
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} else {
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Bar[row*LCOLS+col].val2 = rev?XRES-val2:val2;
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val2 = 0;
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}
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len--;
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col++;
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}
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break;
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case DIR_SOUTH:
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val1 = len-val1;
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val2 = len-val2;
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rev = 1;
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case DIR_NORTH:
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while (len > 0 && row < LROWS) {
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Bar[row*LCOLS+col].dir=dir;
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Bar[row*LCOLS+col].segment=-1;
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if (val1 >= YRES) {
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Bar[row*LCOLS+col].val1 = rev?0:YRES;
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val1 -= YRES;
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} else {
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Bar[row*LCOLS+col].val1 = rev?YRES-val1:val1;
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val1 = 0;
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}
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if (val2 >= YRES) {
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Bar[row*LCOLS+col].val2 = rev?0:YRES;
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val2 -= YRES;
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} else {
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Bar[row*LCOLS+col].val2 = rev?YRES-val2:val2;
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val2 = 0;
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}
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len--;
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row++;
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}
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break;
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}
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}
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static void drv_generic_text_bar_create_segments (void)
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{
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int i, j, n;
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int res, l1, l2;
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/* find first unused segment */
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for (i=fSegment; i<nSegment && Segment[i].used; i++);
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/* pack unused segments */
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for (j=i+1; j<nSegment; j++) {
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if (Segment[j].used)
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Segment[i++]=Segment[j];
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}
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nSegment=i;
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/* create needed segments */
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for (n=0; n<LROWS*LCOLS; n++) {
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if (Bar[n].dir==0) continue;
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res=Bar[n].dir & (DIR_EAST|DIR_WEST) ? XRES:YRES;
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for (i=0; i<nSegment; i++) {
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if (Segment[i].dir & Bar[n].dir) {
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l1 = Segment[i].val1; if (l1>res) l1=res;
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l2 = Segment[i].val2; if (l2>res) l2=res;
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if (l1 == Bar[n].val1 && l2 == Bar[n].val2) break;
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}
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}
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if (i==nSegment) {
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nSegment++;
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Segment[i].val1=Bar[n].val1;
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Segment[i].val2=Bar[n].val2;
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Segment[i].dir=Bar[n].dir;
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Segment[i].used=0;
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Segment[i].ascii=-1;
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}
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Bar[n].segment=i;
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}
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}
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static int drv_generic_text_bar_segment_error (int i, int j)
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{
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int res;
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int i1, i2, j1, j2;
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if (i==j) return 65535;
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if (!(Segment[i].dir & Segment[j].dir)) return 65535;
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res = Segment[i].dir&(DIR_EAST|DIR_WEST) ? XRES:YRES;
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i1=Segment[i].val1; if (i1>res) i1=res;
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i2=Segment[i].val2; if (i2>res) i2=res;
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j1=Segment[j].val1; if (j1>res) j1=res;
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j2=Segment[j].val2; if (j2>res) j2=res;
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if (i1==0 && j1!=0) return 65535;
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if (i2==0 && j2!=0) return 65535;
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if (i1==res && j1<res) return 65535;
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if (i2==res && j2<res) return 65535;
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if (i1==1 && j1!=1 && i2 > 0) return 65535;
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if (i2==1 && j2!=1 && j1 > 0) return 65535;
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if (i1==i2 && j1!=j2) return 65535;
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return (i1-j1)*(i1-j1)+(i2-j2)*(i2-j2);
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}
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static void drv_generic_text_bar_pack_segments (void)
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{
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int i, j, n, min;
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int pack_i, pack_j;
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int pass1=1;
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int error[nSegment][nSegment];
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if (nSegment<=fSegment+CHARS) {
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return;
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}
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for (i=0; i<nSegment; i++) {
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for (j=0; j<nSegment; j++) {
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error[i][j]=drv_generic_text_bar_segment_error(i,j);
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}
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}
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while (nSegment>fSegment+CHARS) {
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min=65535;
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pack_i=-1;
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pack_j=-1;
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for (i=fSegment; i<nSegment; i++) {
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if (pass1 && Segment[i].used) continue;
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for (j=0; j<nSegment; j++) {
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if (error[i][j]<min) {
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min=error[i][j];
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pack_i=i;
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pack_j=j;
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}
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}
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}
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if (pack_i==-1) {
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if (pass1) {
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pass1=0;
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continue;
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} else {
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error ("unable to compact bar characters");
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nSegment=CHARS;
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break;
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}
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}
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#if 0
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debug ("pack_segment: n=%d i=%d j=%d min=%d", nSegment, pack_i, pack_j, min);
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debug ("Pack_segment: i1=%d i2=%d j1=%d j2=%d\n",
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Segment[pack_i].val1, Segment[pack_i].val2,
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Segment[pack_j].val1, Segment[pack_j].val2);
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#endif
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nSegment--;
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Segment[pack_i]=Segment[nSegment];
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for (i=0; i<nSegment; i++) {
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error[pack_i][i]=error[nSegment][i];
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error[i][pack_i]=error[i][nSegment];
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}
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for (n=0; n<LROWS*LCOLS; n++) {
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if (Bar[n].segment==pack_i) Bar[n].segment=pack_j;
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if (Bar[n].segment==nSegment) Bar[n].segment=pack_i;
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}
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}
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}
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static void drv_generic_text_bar_define_chars (void(*defchar)(int ascii, char *matrix))
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{
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int c, i, j;
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char buffer[8];
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for (i=fSegment; i<nSegment; i++) {
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if (Segment[i].used) continue;
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if (Segment[i].ascii!=-1) continue;
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for (c=0; c<CHARS; c++) {
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for (j=fSegment; j<nSegment; j++) {
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if (Segment[j].ascii==c) break;
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}
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if (j==nSegment) break;
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}
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Segment[i].ascii=c;
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switch (Segment[i].dir) {
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case DIR_WEST:
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for (j=0; j<4; j++) {
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buffer[j ]=(1<<Segment[i].val1)-1;
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buffer[j+4]=(1<<Segment[i].val2)-1;
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}
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break;
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case DIR_EAST:
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for (j=0; j<4; j++) {
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buffer[j ]=255<<(XRES-Segment[i].val1);
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buffer[j+4]=255<<(XRES-Segment[i].val2);
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}
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break;
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case DIR_NORTH:
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for (j=0; j<Segment[i].val1; j++) {
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buffer[7-j]=(1<<XRES)-1;
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}
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for (; j<YRES; j++) {
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buffer[7-j]=0;
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}
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break;
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case DIR_SOUTH:
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for (j=0; j<Segment[i].val1; j++) {
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buffer[j]=(1<<XRES)-1;
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}
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for (; j<YRES; j++) {
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buffer[j]=0;
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}
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break;
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}
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defchar(c, buffer);
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}
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}
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int drv_generic_text_draw_bar (WIDGET *W, int goto_len,
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void (*drv_defchar)(int ascii, char *buffer),
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void (*drv_goto)(int row, int col),
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void (*drv_write)(char *buffer, int len))
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{
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WIDGET_BAR *B = W->data;
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int row, col, len, res, max, val1, val2;
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int c, n, s;
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DIRECTION dir;
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row = W->row;
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col = W->col;
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dir = B->direction;
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len = B->length;
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// maybe grow layout framebuffer
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// bars *always* grow heading North or East!
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if (dir & (DIR_EAST|DIR_WEST)) {
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drv_generic_text_resizeFB (row, col+len-1);
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} else {
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drv_generic_text_resizeFB (row, col);
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}
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res = dir & (DIR_EAST|DIR_WEST)?XRES:YRES;
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max = len * res;
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val1 = B->val1 * (double)(max);
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val2 = B->val2 * (double)(max);
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if (val1<1) val1=1;
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else if (val1>max) val1=max;
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if (val2<1) val2=1;
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else if (val2>max) val2=max;
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// create this bar
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drv_generic_text_bar_create_bar (row, col, dir, len, val1, val2);
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// process all bars
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drv_generic_text_bar_create_segments ();
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drv_generic_text_bar_pack_segments ();
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drv_generic_text_bar_define_chars(drv_defchar);
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// reset usage flags
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for (s=0; s<nSegment; s++) {
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Segment[s].used=0;
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}
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// set usage flags
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for (n=0; n<LROWS*LCOLS; n++) {
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if ((s=Bar[n].segment)!=-1) Segment[s].used=1;
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}
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// transfer bars into layout buffer
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for (n=0; n<LCOLS*LROWS; n++) {
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s=Bar[n].segment;
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if (s==-1) continue;
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c=Segment[s].ascii;
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if (c==-1) continue;
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if(c==LayoutFB[n]) continue;
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LayoutFB[n]=c;
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}
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// transfer differences to the display
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for (row=0; row<DROWS; row++) {
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for (col=0; col<DCOLS; col++) {
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int pos1, pos2, equal;
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if (LayoutFB[row*LCOLS+col]==DisplayFB[row*DCOLS+col]) continue;
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drv_goto (row, col);
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for (pos1=col, pos2=pos1, col++, equal=0; col<DCOLS; col++) {
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if (LayoutFB[row*LCOLS+col]==DisplayFB[row*DCOLS+col]) {
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// If we find just one equal byte, we don't break, because this
|
|
// would require a goto, which takes several bytes, too.
|
|
if (++equal>goto_len) break;
|
|
} else {
|
|
pos2=col;
|
|
equal=0;
|
|
}
|
|
}
|
|
memcpy (DisplayFB+row*DCOLS+pos1, LayoutFB+row*LCOLS+pos1, pos2-pos1+1);
|
|
drv_write (DisplayFB+row*DCOLS+pos1, pos2-pos1+1);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
// ****************************************
|
|
// *** generic init/quit ***
|
|
// ****************************************
|
|
|
|
int drv_generic_text_init (char *driver)
|
|
{
|
|
|
|
Driver=driver;
|
|
|
|
// init display framebuffer
|
|
DisplayFB = (char*)malloc(DCOLS*DROWS*sizeof(char));
|
|
memset (DisplayFB, ' ', DROWS*DCOLS*sizeof(char));
|
|
|
|
// init layout framebuffer
|
|
LROWS = 0;
|
|
LCOLS = 0;
|
|
LayoutFB=NULL;
|
|
drv_generic_text_resizeFB (DROWS, DCOLS);
|
|
|
|
// sanity check
|
|
if (LayoutFB==NULL || DisplayFB==NULL) {
|
|
error ("%s: framebuffer could not be allocated: malloc() failed", Driver);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int drv_generic_text_bar_init (void)
|
|
{
|
|
if (Bar) free (Bar);
|
|
|
|
if ((Bar=malloc (LROWS*LCOLS*sizeof(BAR)))==NULL) {
|
|
error ("bar buffer allocation failed: out of memory");
|
|
return -1;
|
|
}
|
|
|
|
nSegment=0;
|
|
fSegment=0;
|
|
|
|
drv_generic_text_bar_clear();
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void drv_generic_text_bar_add_segment(int val1, int val2, DIRECTION dir, int ascii)
|
|
{
|
|
Segment[fSegment].val1=val1;
|
|
Segment[fSegment].val2=val2;
|
|
Segment[fSegment].dir=dir;
|
|
Segment[fSegment].used=0;
|
|
Segment[fSegment].ascii=ascii;
|
|
|
|
fSegment++;
|
|
nSegment=fSegment;
|
|
}
|
|
|
|
|
|
int drv_generic_text_quit (void) {
|
|
|
|
if (LayoutFB) {
|
|
free(LayoutFB);
|
|
LayoutFB=NULL;
|
|
}
|
|
|
|
if (DisplayFB) {
|
|
free(DisplayFB);
|
|
DisplayFB=NULL;
|
|
}
|
|
|
|
if (Bar) {
|
|
free (Bar);
|
|
Bar=NULL;
|
|
}
|
|
|
|
return (0);
|
|
}
|